drivers/gpu/drm/amd/amdkfd/cik_event_interrupt.c

   1 /*
   2  * Copyright 2014 Advanced Micro Devices, Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  */
  22
  23 #include "kfd_priv.h"
  24 #include "kfd_events.h"
  25 #include "cik_int.h"
  26
  27 static bool cik_event_interrupt_isr(struct kfd_dev *dev,
  28                                         const uint32_t *ih_ring_entry,
  29                                         uint32_t *patched_ihre,
  30                                         bool *patched_flag)
  31 {
  32         const struct cik_ih_ring_entry *ihre =
  33                         (const struct cik_ih_ring_entry *)ih_ring_entry;
  34         const struct kfd2kgd_calls *f2g = dev->kfd2kgd;
  35         unsigned int vmid, pasid;
  36
  37         /* This workaround is due to HW/FW limitation on Hawaii that
  38          * VMID and PASID are not written into ih_ring_entry
  39          */
  40         if ((ihre->source_id == CIK_INTSRC_GFX_PAGE_INV_FAULT ||
  41                 ihre->source_id == CIK_INTSRC_GFX_MEM_PROT_FAULT) &&
  42                 dev->device_info->asic_family == CHIP_HAWAII) {
  43                 struct cik_ih_ring_entry *tmp_ihre =
  44                         (struct cik_ih_ring_entry *)patched_ihre;
  45
  46                 *patched_flag = true;
  47                 *tmp_ihre = *ihre;
  48
  49                 vmid = f2g->read_vmid_from_vmfault_reg(dev->kgd);
  50                 pasid = f2g->get_atc_vmid_pasid_mapping_pasid(dev->kgd, vmid);
  51
  52                 tmp_ihre->ring_id &= 0x000000ff;
  53                 tmp_ihre->ring_id |= vmid << 8;
  54                 tmp_ihre->ring_id |= pasid << 16;
  55
  56                 return (pasid != 0) &&
  57                         vmid >= dev->vm_info.first_vmid_kfd &&
  58                         vmid <= dev->vm_info.last_vmid_kfd;
  59         }
  60
  61         /* Only handle interrupts from KFD VMIDs */
  62         vmid  = (ihre->ring_id & 0x0000ff00) >> 8;
  63         if (vmid < dev->vm_info.first_vmid_kfd ||
  64             vmid > dev->vm_info.last_vmid_kfd)
  65                 return 0;
  66
  67         /* If there is no valid PASID, it's likely a firmware bug */
  68         pasid = (ihre->ring_id & 0xffff0000) >> 16;
  69         if (WARN_ONCE(pasid == 0, "FW bug: No PASID in KFD interrupt"))
  70                 return 0;
  71
  72         /* Interrupt types we care about: various signals and faults.
  73          * They will be forwarded to a work queue (see below).
  74          */
  75         return ihre->source_id == CIK_INTSRC_CP_END_OF_PIPE ||
  76                 ihre->source_id == CIK_INTSRC_SDMA_TRAP ||
  77                 ihre->source_id == CIK_INTSRC_SQ_INTERRUPT_MSG ||
  78                 ihre->source_id == CIK_INTSRC_CP_BAD_OPCODE ||
  79                 ihre->source_id == CIK_INTSRC_GFX_PAGE_INV_FAULT ||
  80                 ihre->source_id == CIK_INTSRC_GFX_MEM_PROT_FAULT;
  81 }
  82
  83 static void cik_event_interrupt_wq(struct kfd_dev *dev,
  84                                         const uint32_t *ih_ring_entry)
  85 {
  86         const struct cik_ih_ring_entry *ihre =
  87                         (const struct cik_ih_ring_entry *)ih_ring_entry;
  88         uint32_t context_id = ihre->data & 0xfffffff;
  89         unsigned int vmid  = (ihre->ring_id & 0x0000ff00) >> 8;
  90         unsigned int pasid = (ihre->ring_id & 0xffff0000) >> 16;
  91
  92         if (pasid == 0)
  93                 return;
  94
  95         if (ihre->source_id == CIK_INTSRC_CP_END_OF_PIPE)
  96                 kfd_signal_event_interrupt(pasid, context_id, 28);
  97         else if (ihre->source_id == CIK_INTSRC_SDMA_TRAP)
  98                 kfd_signal_event_interrupt(pasid, context_id, 28);
  99         else if (ihre->source_id == CIK_INTSRC_SQ_INTERRUPT_MSG)
 100                 kfd_signal_event_interrupt(pasid, context_id & 0xff, 8);
 101         else if (ihre->source_id == CIK_INTSRC_CP_BAD_OPCODE)
 102                 kfd_signal_hw_exception_event(pasid);
 103         else if (ihre->source_id == CIK_INTSRC_GFX_PAGE_INV_FAULT ||
 104                 ihre->source_id == CIK_INTSRC_GFX_MEM_PROT_FAULT) {
 105                 struct kfd_vm_fault_info info;
 106
 107                 kfd_process_vm_fault(dev->dqm, pasid);
 108
 109                 memset(&info, 0, sizeof(info));
 110                 dev->kfd2kgd->get_vm_fault_info(dev->kgd, &info);
 111                 if (!info.page_addr && !info.status)
 112                         return;
 113
 114                 if (info.vmid == vmid)
 115                         kfd_signal_vm_fault_event(dev, pasid, &info);
 116                 else
 117                         kfd_signal_vm_fault_event(dev, pasid, NULL);
 118         }
 119 }
 120
 121 const struct kfd_event_interrupt_class event_interrupt_class_cik = {
 122         .interrupt_isr = cik_event_interrupt_isr,
 123         .interrupt_wq = cik_event_interrupt_wq,
 124 };